JP2011182007A - Relay transmitting and receiving apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a relay transmitting and receiving apparatus having a function to suppress interference in the transmitting and receiving apparatus because of sneaking of a transmitted wave or a received wave, radio wave interference between a transmitted signal and a received signal, and waveform distortion. <P>SOLUTION: The relay transmitting and receiving apparatus 10 includes a base station side antenna 100 and a mobile station side antenna 200, i.e., the reception units which receive the first signal transmitted and received to/from a base station and the second signal transmitted and received to/from a mobile station, a base station side local oscillator circuit 306 and a mobile station side local oscillator circuit 307, i.e., the frequency conversion units which convert the frequencies of the first signal and/or the second signal so that the frequency of the first signal is different from that of the second signal, and a base station side antenna 100 and a mobile station side antenna 200, i.e., the transmission units which transmit the first signal and second signal generated by the base station side local oscillator circuit 306 and the mobile station side local oscillator circuit 307. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a relay transmission / reception apparatus, and more particularly to a relay transmission / reception apparatus that relays radio transmission / reception performed between a mobile station and a base station.

  In a conventional relay transmission / reception apparatus, radio signals are transmitted / received on the same frequency. Due to the system configuration for relaying radio transmission / reception signals on the same frequency, reception on the base station side and transmission on the mobile station side are processed at the same time.

  In a conventional relay transmission / reception device, radio transmission / reception signals are relayed on the same frequency, and base station side reception and mobile station side transmission are processed in the same time, so the RF top filter eliminates in-device interference due to its own transmission wraparound. There is a problem that the transmission output cannot be increased due to the sensitivity suppression performance of the receiver.

  In addition, in a mobile system using OFDMA (Orthogonal Frequency Division Multiplexing Access) for access control, a filter having particularly large adjacent channel suppression capability is required, but there is a problem that the circuit scale of the filter increases.

  In addition, the level detection of the relay transmitting / receiving apparatus needs to process the received wave received from the base station or mobile station in real time, but in a mobile system using OFDMA for access control, the amplitude of the received wave is in the time axis direction. Since the difference is large, there is a problem that the waveform is distorted by real-time processing.

  The present invention has been made to solve the above-described problem, and has a function of suppressing in-device interference due to wraparound of transmission / reception waves, radio wave interference between transmission / reception signals, and waveform distortion without increasing the circuit scale. An object of the present invention is to provide a relay transmission / reception device having

  A first aspect of the present invention is a relay transmission / reception device that relays radio transmission / reception performed between a base station and a mobile station, the first signal transmitted / received to / from the base station, and the mobile station A receiving unit that receives a second signal transmitted and received between the first signal and / or the second signal so that a frequency of the first signal is different from a frequency of the second signal. And a transmission unit for transmitting the first signal and the second signal output from the frequency conversion unit.

  A first aspect of the present invention is a relay transmission / reception device that relays radio transmission / reception performed between a base station and a mobile station, the first signal transmitted / received to / from the base station, A receiving unit that receives a second signal transmitted to and received from a mobile station, a memory unit that records signal information of the first signal and the second signal, and a detection that detects a frame timing of the first signal A first control unit that writes the signal information to the memory unit according to the frame timing detected by the detection unit, and reads the signal information of the memory unit according to the frame timing; A transmission unit configured to transmit the first signal and the second signal according to the read timing in one control unit.

  A second aspect of the present invention is a relay transmission / reception device that relays radio transmission / reception performed between a base station and a mobile station, the first signal transmitted / received to / from the base station, A receiving unit for receiving a second signal transmitted to and received from a mobile station, a memory unit for recording signal information of the first signal and the second signal, and detecting a frame / slot timing of the first signal A first detection unit that writes the signal information to the memory unit according to the frame / slot timing detected by the detection unit, and reads the signal information from the memory unit according to the frame / slot timing. A control unit; and a transmission unit configured to transmit the first signal and the second signal in accordance with the read timing in the first control unit.

  A third aspect of the present invention is a relay transmission / reception apparatus that relays radio transmission / reception performed between a base station and a mobile station, wherein the first signal transmitted / received to / from the base station, A receiving unit that receives a second signal transmitted to and received from a mobile station; an amplifying unit that amplifies and outputs the received first signal and the second signal at a predetermined amplification rate; and A detection unit for detecting a frame / slot timing of the signal, and a calculation unit for detecting a reception level of the first signal based on the frame / slot timing in the detection unit and calculating an average reception level value for each slot. A second control unit for controlling the amplification factor in the amplifying unit according to the reception level average value in the arithmetic unit; and a transmission for transmitting the first signal and the second signal amplified in the amplifying unit. And a part.

  According to the first aspect of the present invention, there is provided a relay transmission / reception device that relays radio transmission / reception performed between a base station and a mobile station, the first signal transmitted / received to / from the base station, A receiving unit that receives a second signal transmitted to and received from a mobile station, and the first signal and / or the second signal so that the frequency of the first signal is different from the frequency of the second signal. A frequency conversion unit for converting the frequency of the first signal and a transmission unit for transmitting the first signal and the second signal output from the frequency conversion unit, so that the first signal on the base station side and the mobile station side It becomes possible to suppress sneak interference caused by the second signal.

  According to the second aspect of the present invention, there is provided a relay transmission / reception device that relays radio transmission / reception performed between a base station and a mobile station, wherein the first signal transmitted / received between the base station and A receiving unit that receives a second signal transmitted to and received from the mobile station, a memory unit that records signal information of the first signal and the second signal, and frame / slot timing of the first signal The signal information is written to the memory unit according to the frame / slot timing detected by the detection unit, and the signal information of the memory unit is read according to the frame / slot timing. By including a first control unit and a transmission unit that transmits the first signal and the second signal in accordance with the read timing in the first control unit, Transmission of moving station, it is possible to shift the timing of the reception of the transmission and the mobile station side on the base station side, it is possible to suppress the respective interference.

  According to the third aspect of the present invention, there is provided a relay transmission / reception device that relays radio transmission / reception performed between a base station and a mobile station, wherein the first signal transmitted / received between the base station and A receiving unit that receives a second signal transmitted to and received from the mobile station, an amplifying unit that amplifies and outputs the received first signal and the second signal at a predetermined amplification rate, and A detection unit for detecting the frame / slot timing of the first signal, and an operation for detecting the reception level of the first signal based on the frame / slot timing in the detection unit and calculating an average reception level for each slot A second control unit that controls the amplification factor in the amplification unit according to the reception level average value in the calculation unit, and the first signal and the second signal amplified in the amplification unit are transmitted By providing a transmission unit that, without distorting the waveform of the first signal and the second signal, can be transmitted.

It is a figure which shows the structure of the relay transmission / reception apparatus which concerns on embodiment 1 and 3. FIG. 6 is a diagram showing a frame configuration according to Embodiments 1 and 2. FIG. FIG. 10 is a diagram illustrating a configuration of a frame according to Embodiment 2.

<A. Embodiment 1>
<A-1. Configuration>
FIG. 1 is a diagram illustrating a configuration of a relay transmission / reception apparatus according to the present embodiment. In FIG. 1, the relay transmitting / receiving apparatus 10 includes base station side transmission / reception mechanisms 100 to 102, 103 to 111 downlink signal processing units, 200 to 202 mobile station side transmission / reception mechanisms, 203 to 212 uplink signal processing units, and 300. Reference numerals 305 to 307 denote timing control units of the relay transmission / reception apparatus, and 306 to 307 denote local oscillation circuits (synthesizers).

  As shown in FIG. 1, the relay transmission / reception apparatus 10 includes a base station side antenna 100 which is a reception unit and a transmission unit, and a base station side antenna filter 101 connected to the base station side antenna 100 as a base station side transmission / reception mechanism. And a base station side TDD (Time Division Duplex) switch 102 connected to the base station side antenna filter 101. In addition, as a downlink signal processing unit, a base station side LNA (Low Noise Amplifier) 103 connected to the base station side TDD switch 102, a base station side down converter 104 connected to the base station side LNA 103, a base station side down converter Downlink reception variable gain amplifier 105 connected to converter 104, downlink adjacent channel removal filter 106 connected to downlink reception variable gain amplifier 105, and downlink ADC (Analog Digital Converter) unit connected to downlink adjacent channel removal filter 106 107, a downlink waveform memory unit 108 connected to the downlink ADC unit 107, a downlink DAC (Digital Analog Converter) unit 109 connected to the downlink waveform memory unit 108, and a movement connected to the downlink DAC unit 109 Comprises the side up-converter 110, connected to the mobile station side upconverter 110 the mobile station HPA and (Head Phone Amplifier) 111.

  In addition, as a transmission / reception mechanism on the mobile station side, the mobile station side antenna 200 which is a reception unit and a transmission unit, a mobile station side antenna filter 201 connected to the mobile station side antenna 200, and a mobile station side antenna filter 201 are connected. Mobile station side TDD switch 202. Also, as an uplink signal processing unit, a mobile station side LNA 203 connected to the mobile station side TDD switch 202, a mobile station side down converter 204 connected to the mobile station side LNA 203, and a mobile station side down converter 204 are connected. Uplink reception variable gain amplifier 205, uplink adjacent channel removal filter 206 connected to uplink reception variable gain amplifier 205, uplink ADC unit 207 connected to uplink adjacent channel removal filter 206, and uplink ADC unit 207 Uplink waveform memory unit 208, uplink DAC unit 209 connected to uplink waveform memory unit 208, uplink transmission amplifier 210 connected to uplink DAC unit 209, and base station side upconverter 211 connected to uplink transmission amplifier 210 And base station side upconverter 211 and base station side TDD switch 1 And a 2 and the connected base station side HPA212.

  Further, as a timing control unit of the relay transmission / reception apparatus, a frame / slot timing detection unit 300 and a reception level measurement unit 301 to which an output of the downlink ADC unit 107 is input, a downlink reception variable gain amplifier 105, an uplink reception variable gain amplifier 205, Downlink relay gain control unit 302 and uplink relay gain control unit 303 connected to, downlink write / read control unit 304 connected to downlink waveform memory unit 108, and uplink write / read control connected to uplink waveform memory unit 208 Unit 305. Further, a base station side local oscillation circuit (synthesizer) 306 as an oscillation circuit of the first signal generation frequency, which connects the base station side down converter 104 and the base station side up converter 211, a mobile station side up converter 110, A mobile station side local oscillation circuit (synthesizer) 307 serving as an oscillation circuit having a second signal generation frequency is connected to the mobile station side down converter 204.

  The downlink write / read control unit 304, the uplink write / read control unit 305, the frame / slot timing detection unit 300, and the reception level measurement unit 301 are connected to each other.

<A-2. Operation>
The relay transmitting / receiving apparatus 10 includes a base station side local oscillation circuit (synthesizer) 306 and a mobile station side local oscillation circuit (synthesizer) 307, which are frequency converters. Is converted so that the frequency of the second signal that is the mobile station side radio signal is different, and when the base station side antenna 100 receives the first signal, the mobile station side antenna 200 also receives the second signal. When the base station side antenna 100 transmits the first signal, the mobile station side antenna 200 controls to invert the frame so that the second signal is transmitted. The operation of reception level measurement section 301 will be described in Embodiment 3.

<A-2-1. Frequency conversion>
First, the frequency conversion will be described. The frequency of the base station side radio signal is f ₁ , and the frequency of the mobile station side radio signal is f ₂ . Further, the frequency of the base station side local oscillation circuit (synthesizer) 306 mounted on the relay transmission / reception device 10 is f _BB1 , and the frequency of the mobile station side local oscillation circuit (synthesizer) 307 mounted on the relay transmission / reception device 10 is f _BB2 .

By making the relationship between f _BB1 and f _BB2 as follows, f ₁ on the base station side can be converted to f ₂ on the mobile station side, and conversely, f ₂ on the mobile station side can be converted to f ₁ on the base station side. .

_{f BB1 -f BB2 = f 1 -f} 2 ( If you want to f _1> f ₂₎
f _BB2 -f _BB1 = f ₂ -f ₁ (when f ₁ <f ₂ )
As described above, the difference between the frequency of the first signal and the frequency of the second signal is obtained by _dividing the frequency f _BB1 of the base station side local oscillation circuit (synthesizer) 306 and the frequency f of the mobile station side local oscillation circuit (synthesizer) 307. It is defined by the difference from _BB2, and by converting the frequency in this way, in-device interference due to wraparound can be avoided.

<A-2-2. Frame inversion>
Next, the frame inversion will be described. In downlink radio communication, the downlink first signal on the base station side is converted into downlink digital data by the downlink ADC unit 107, stored in the downlink waveform memory unit 108, and from the downlink waveform memory unit 108 at an arbitrary timing. The downstream digital data is read and converted into a downstream analog signal by the downstream DAC unit 109.

  Similarly, in uplink radio communication, the uplink second signal on the mobile station side is converted into uplink digital data by the uplink ADC unit 207, stored in the uplink waveform memory unit 208, and the uplink waveform memory unit at an arbitrary timing. The upstream digital data is read from 208 and converted to an upstream analog signal by the upstream DAC unit 209.

  By adopting such a structure, it is possible to transmit uplink and downlink radio signals at an arbitrary timing regardless of reception. In other words, conventionally, transmission and reception are mixed because the uplink (downlink) slot is allocated on the mobile station side at the timing when the uplink (downlink) slot is allocated on the base station side. According to Embodiment 1, frame inversion that assigns a downlink (uplink) slot on the mobile station side can be realized at a timing when an uplink (downlink) slot is allocated on the base station side, so that transmission and reception are mixed. Can be avoided.

  By adopting such a structure, it is possible to suppress the occurrence of radio wave interference between the base station side and the mobile station side without increasing the circuit scale.

<A-2-3. Frame configuration>
The frequency conversion and frame inversion will be described in detail below with reference to FIGS.

  As shown in FIG. 2, an upstream frame and a downstream frame are arranged on the base station side and the mobile station side, respectively.

  The frame arrangement on the base station side is arranged in the order of uplink frames and downlink frames, and the frame arrangement on the mobile station side is arranged in the order of downlink frames and uplink frames. That is, the arrangement of the uplink frame and the downlink frame is switched between the base station side and the mobile station side, and when the base station side transmits (uplink direction), the mobile station side also transmits (downlink direction). At the time (downward direction), the mobile station side is also arranged to receive (upward direction).

  As described above, the relay transmitting / receiving apparatus 10 is provided with the downstream waveform memory unit 108 and the upstream waveform memory unit 208 having a memory capacity sufficient to store data for one frame, as shown in FIG.

  In Embodiment 1, downlink wireless communication will be described. In the case of the uplink direction, the operation is the same except for the directionality, and the description is omitted.

  The frame / slot timing detection unit 300 recognizes the beginning of the frame of the first downlink signal received from the base station, and notifies the downlink write / read control unit 304 of the frame information. A downlink write / read controller 304 as a first controller performs write / read control of the downlink waveform memory unit 108 based on frame information or slot information.

  First, reception of the first signal in the downlink direction will be described. The downlink first signal received from the base station is converted into downlink digital data by the downlink ADC unit 107 and sent to the downlink waveform memory unit 108. Based on the frame information notified from the frame / slot timing detection unit 300, the downlink write / read control unit 304 writes to the downlink waveform memory unit 108 when the downlink frame timing of one frame on the base station side has arrived. The downstream waveform memory unit 108 stores downstream digital data in the memory.

  Next, transmission of the second signal in the downlink direction will be described. Based on the frame information notified from the frame / slot timing detection unit 300, the downlink write / read control unit 304 notifies the downlink waveform memory unit 108 when the downlink frame timing of one frame on the mobile station side has arrived. Control to read down digital data. The downlink digital data output from the downlink waveform memory unit 108 is converted into a downlink analog signal by the downlink DAC unit 109, up-converted by the mobile station side up-converter 110, and transmitted to the mobile station side.

  By adopting such a configuration, it is possible to shift the timing of reception on the base station side and transmission on the mobile station side, and transmission on the base station side and reception on the mobile station side.

  Further, the first signal on the base station side can be transmitted as the second signal to the mobile station side and the second signal on the mobile station side can be transmitted as the first signal to the base station side without performing data reproduction. .

  Note that the frequency conversion and frame inversion described above can function independently of each other.

<A-3. Effect>
According to Embodiment 1 of the present invention, a relay transmitting / receiving apparatus 10 that relays radio transmission / reception performed between a base station and a mobile station, the first signal transmitted / received to / from the base station, The base station side antenna 100 and the mobile station side antenna 200, which are reception units that receive the second signal transmitted and received with the mobile station, so that the frequency of the first signal and the frequency of the second signal are different. Base station side local oscillation circuit 306 and mobile station side local oscillation circuit 307 which are frequency conversion units for converting the frequency of the first signal and / or the second signal, base station side local oscillation circuit 306 and mobile station side local oscillation circuit The base station side first signal is provided with the base station side antenna 100 and the mobile station side antenna 200 which are transmission units that transmit the first signal and the second signal generated using the frequency output by the 307. It is possible to suppress the coupling loop interference from the second signal of the mobile station side.

  Further, according to the first embodiment of the present invention, in the relay transmitting / receiving apparatus, the base station side local oscillation circuit 306 that is the oscillation circuit of the first signal generation frequency and the movement that is the oscillation circuit of the second signal generation frequency The local side oscillation circuit 307 is provided, and the difference between the frequency of the first signal and the frequency of the second signal is defined by the difference between the frequency of the base station side local oscillation circuit 306 and the frequency of the mobile station side local oscillation circuit 307. By doing so, it is possible to perform frequency conversion so that the frequency of the first signal on the base station side and the frequency of the second signal on the mobile station side are different, and suppress wraparound interference due to these.

  Further, according to the first embodiment of the present invention, in the relay transmitting / receiving apparatus, the down waveform memory unit 108 and the up waveform memory unit 208, which are memory units for recording the signal information of the first signal and the second signal, A frame / slot timing detection unit 300 that is a detection unit for detecting the frame / slot timing of one signal, and a down waveform memory unit 108 and an up waveform memory according to the frame / slot timing detected by the frame / slot timing detection unit 300 The signal information is written in the unit 208, and the downstream write / read control unit 304 and the upstream write / read are the first control units that read out the signal information of the downstream waveform memory unit 108 and the upstream waveform memory unit 208 according to the frame / slot timing. And a transmission unit. The base station side antenna 100 and the mobile station side antenna 200 transmit the first signal and the second signal according to the read timing in the downlink write / read control unit 304 and the uplink write / read control unit 305, thereby The timings of reception on the station side and transmission on the mobile station side, transmission on the base station side and reception on the mobile station side can be shifted, and radio wave interference in each case can be suppressed.

  Moreover, according to Embodiment 1 of the present invention, the relay transmitting / receiving apparatus 10 that relays radio transmission / reception performed between a base station and a mobile station, the first signal transmitted / received to / from the base station And a base station side antenna 100 and a mobile station side antenna 200 which are receiving units for receiving a second signal transmitted to and received from the mobile station, and a memory unit for recording signal information of the first signal and the second signal The downstream waveform memory unit 108 and the upstream waveform memory unit 208, the frame / slot timing detection unit 300 which is a detection unit for detecting the frame / slot timing of the first signal, and the frame detected by the frame / slot timing detection unit 300 / Signal information is written into the down waveform memory unit 108 and the up waveform memory unit 208 according to the slot timing, and the frame / slot type In response to the data, the downlink write / read control unit 304 and the uplink write / read control unit 305, which are first control units that read the signal information of the downlink waveform memory unit 108 and the uplink waveform memory unit 208, and the downlink write / read control unit 304 and the base station side antenna 100 and the mobile station side antenna 200, which are transmission units that transmit the first signal and the second signal, according to the read timing in the uplink write / read control unit 305, the base station Side reception and mobile station side transmission, base station side transmission and mobile station side reception timing can be shifted, and radio wave interference in each case can be suppressed.

  Also, according to the first embodiment of the present invention, in the relay transmission / reception apparatus, the downlink write / read control unit 304 and the uplink write / read control unit 305, which are the first control unit, correspond to the frame / slot timing. By receiving signal information so as to shift the timing of reception of the first signal and transmission of the second signal, or transmission of the first signal and reception of the second signal, reception on the base station side and transmission on the mobile station side, The transmission timing on the base station side and the reception timing on the mobile station side can be shifted, and radio wave interference in each case can be suppressed.

<B. Second Embodiment>
<B-1. Configuration>
FIG. 3 shows a variation of the slot arrangement of FIG. 2 shown in the first embodiment. In the figure, U indicates an uplink slot, D indicates a downlink slot, FIG. 3A shows a case where an uplink frame and a downlink frame are arranged every two slots, and FIG. 3B shows an uplink slot and a downlink slot. The case where slots are alternately arranged is shown. As shown in the figure, a case is shown in which 4 slots for uplink and downlink are prepared.

  In FIG. 3A, the slot arrangement on the base station side is arranged in the order of uplink slots U1, U2, downlink slots D1, D2, uplink slots U3, U4, downlink slots D3, D4, and on the mobile station side. The slot arrangement is arranged in the order of downlink slots D1, D2, uplink slots U1, U2, downlink slots D3, D4, uplink slots U3, U4.

  In FIG.3 (b), as for slot arrangement | positioning by the side of the base station, the uplink slot and the downlink slot are arrange | positioned alternately. As for the slot arrangement on the mobile station side, uplink slots and downlink slots are alternately arranged in the same manner as the slot arrangement on the base station side, but the uplink and downlink correspondence is reversed from the arrangement on the base station side. Yes. As described above, the relay transmitting / receiving apparatus 10 is provided with the downstream waveform memory unit 108 and the upstream waveform memory unit 208 having a memory capacity sufficient to store data for four slots.

  For convenience of explanation, the four memories respectively held by the down waveform memory unit 108 and the up waveform memory unit 208 are referred to as a memory a, a memory b, a memory c, and a memory d, and in the down direction, slots D1, D2, and D3, respectively. , D4, and slots U1, U2, U3, U4 are allocated in the uplink direction, respectively.

<B-2. Operation>
In the second embodiment, downlink wireless communication will be described with reference to FIG. 1 and FIG. The uplink wireless communication is the same operation except for the directionality thereof, and the description thereof will be omitted. Also, FIG. 3B is the same operation as in FIG. 3A except for the difference in the slot arrangement, and the description is omitted.

  The frame / slot timing detection unit 300 recognizes the head of the first downlink signal frame received from the base station, and notifies the downlink write / read control unit 304 of the slot information including the timing information of the slot head. The downlink writing / reading control unit 304 performs writing / reading control of the downlink waveform memory unit 108 based on the slot information.

  First, reception of the first signal in the downlink direction will be described. The first downlink signal received from the base station is sequentially converted into downlink digital data by the downlink ADC unit 107 and sent to the downlink waveform memory unit 108. The downlink write / read control unit 304 performs write control to the downlink waveform memory unit 108 when the timing of the slot D1, which is the downlink slot, of one frame on the base station side arrives, and the downlink waveform memory unit 108 Data is stored in the memory a. The downlink digital data of the slot D2 following the slot D1 and the slots D3 and D4 that arrive after the slots U3 and U4 are stored in the memory b, the memory c, and the memory d, respectively, similarly to the downlink digital data of the slot D1.

  Next, transmission of the second signal in the downlink direction will be described. The downlink write / read control unit 304 reads the downlink digital data of the slot D1 from the memory a to the downlink waveform memory unit 108 when the timing of the slot D1, which is a downlink frame, of one frame on the mobile station side has arrived. Take control. The downlink digital data output from the downlink waveform memory unit 108 is converted into a downlink analog signal by the downlink DAC unit 109, up-converted by the mobile station side up-converter 110, and transmitted to the mobile station side. The downlink digital data of the slot D2 following the slot D1 and the slots D3 and D4 arriving after the slots U3 and U4 are the memory b, memory c, The signal is read from d, converted to a downlink analog signal by the downlink DAC unit 109, up-converted by the mobile station side up converter 110, and transmitted to the mobile station side.

  By adopting such a configuration, it is possible to shift the timing of reception on the base station side and transmission on the mobile station side, and transmission on the base station side and reception on the mobile station side.

  Further, the first signal on the base station side can be transmitted as the second signal to the mobile station side without performing data reproduction, and conversely, the second signal on the mobile station side can be transmitted as the first signal to the base station side.

  In addition, since the relay transmitting / receiving apparatus 10 recognizes and controls each slot, timing control finer than in the case of the first embodiment is possible. Therefore, in order to shift the timing, the time for delaying the signal to be transmitted / received can be reduced.

<B-3. Effect>
According to the second embodiment of the present invention, in the relay transmission / reception device, the frame / slot timing is the timing of the start of the frame of the radio signal and / or the start of the slot. By recognizing and controlling, finer timing control becomes possible.

<C. Embodiment 3>
<C-1. Configuration>
The relay transmitting / receiving apparatus 10 needs to process a received wave received from a base station or a mobile station in real time. However, in the case of a mobile system using OFDMA for access control, the amplitude of the received wave is in the time axis direction. However, there is a problem that the waveform is distorted by real-time processing. Therefore, the third embodiment aims to solve this problem. The configuration related to relay transmitting / receiving apparatus 10 according to the third embodiment is the same as that shown in the first embodiment, and the phrases and symbols applied in the first embodiment are also applied in the third embodiment. The operations described above are also applied to the third embodiment.

  In the third embodiment, the function of the reception level measurement unit 301 will be mainly described. The reception level measurement unit 301 receives the output of the downlink ADC unit 107 and the output of the frame / slot timing detection unit 300, is connected to the downlink relay gain control unit 302 and the uplink relay gain control unit 303, and performs downlink write / read control. The unit 304 and the upstream write / read control unit 305 are connected.

<C-2. Operation>
The reception level measurement unit 301 as a calculation unit obtains slot information from the frame / slot timing detection unit 300, detects the first signal reception level in the downlink direction on the base station side in units of slots based on the slot information, and Then, the averaging is performed, and the reception level information of the downstream first signal is stored in the built-in memory. The stored reception level information of the first signal in the downlink direction is read when the timing of the same slot of the next frame arrives, and is transmitted to the downlink relay gain control unit 302 and the uplink relay gain control unit 303 as the second control unit. Sent.

  The downlink relay gain control unit 302 is prepared in advance with a power control table corresponding to the reception level information of the downlink first signal, and is provided to the downlink reception variable gain amplifier 105 according to the reception level information of the downlink first signal. By applying power control in this way, appropriate amplification is performed on the downlink radio signal, and waveform distortion is suppressed by averaging processing.

  The uplink relay gain control unit 303 is prepared in advance with a power control table corresponding to the reception level information of the downlink first signal, and is provided for the uplink reception variable gain amplifier 205 according to the reception level information of the downlink first signal. By applying power control, proper amplification is performed on the radio signal in the uplink direction, and waveform distortion is suppressed by averaging processing.

  The reception level measurement unit 301 is independent of the base station side local oscillation circuit 306, the mobile station side local oscillation circuit 307, the downlink write / read control unit 304, and the uplink write / read control unit 305, which are frequency conversion units. Can function.

<C-3. Effect>
According to the third embodiment of the present invention, in the relay transmitting / receiving apparatus, the downlink reception variable gain amplifier 105, which is an amplification unit that amplifies and outputs the received first signal and second signal with a predetermined amplification factor, and the uplink Based on reception variable gain amplifier 205, frame / slot timing detection unit 300 which is a detection unit for detecting the frame / slot timing of the first signal, and the first signal based on the frame / slot timing in frame / slot timing detection unit 300 And a reception level measuring unit 301 that is a calculation unit that detects a reception level of the second signal and calculates a reception level average value in units of slots, and a downlink reception variable gain according to the reception level average value in the reception level measurement unit 301 A second system for controlling the amplification factor in amplifier 105 and uplink reception variable gain amplifier 205 A base station side antenna 100 and a mobile station side antenna 200, which are transmission units, include a downlink reception variable gain amplifier 105 and an uplink reception variable gain amplifier. By transmitting the first signal and the second signal amplified in 205, appropriate amplification and averaging processing can be performed on the first signal and the second signal, and waveform distortion can be suppressed.

  Further, according to the third embodiment of the present invention, in the relay transmission / reception apparatus, the downlink reception variable gain amplifier 105 which is an amplification unit that amplifies and outputs the received first signal and second signal with a predetermined amplification factor. Further, based on the frame / slot timing in the uplink reception variable gain amplifier 205 and the frame / slot timing detection unit 300 which is a detection unit, the reception level of the first signal is detected, and the average reception level value for each slot is calculated. A reception level measurement unit 301 that is a unit, and a downlink control unit that is a second control unit that controls the amplification factor in the downlink reception variable gain amplifier 105 and the uplink reception variable gain amplifier 205 in accordance with the reception level average value in the reception level measurement unit 301 A relay gain control unit 302 and an uplink relay gain control unit 303, and a base station side which is a transmission unit The antenna 100 and the mobile station side antenna 200 transmit the first signal and the second signal amplified in the downlink reception variable gain amplifier 105 and the uplink reception variable gain amplifier 205, so that the first signal and the second signal are Appropriate amplification and averaging processing can be performed, and waveform distortion can be suppressed.

  Moreover, according to Embodiment 3 of the present invention, the relay transmitting / receiving apparatus 10 that relays radio transmission / reception performed between the base station and the mobile station, the first signal transmitted / received to / from the base station And the base station side antenna 100 and the mobile station side antenna 200, which are receiving units that receive the second signal transmitted and received between the mobile station and the received first signal and second signal, a predetermined amplification A downlink reception variable gain amplifier 105 and an uplink reception variable gain amplifier 205 which are amplification units that amplify and output at a rate, a frame / slot timing detection unit 300 that is a detection unit that detects the frame / slot timing of the first signal, and a frame / Slot timing detection unit 300 detects the reception level of the first signal based on the frame / slot timing, and averages the reception level for each slot. A reception level measurement unit 301 that is a calculation unit to calculate, and a second control unit that controls the amplification factors in the downlink reception variable gain amplifier 105 and the uplink reception variable gain amplifier 205 according to the reception level average value in the reception level measurement unit 301 A downlink relay gain control unit 302 and an uplink relay gain control unit 303, and a base station that is a transmission unit that transmits the first signal and the second signal amplified in the downlink reception variable gain amplifier 105 and the uplink reception variable gain amplifier 205 By providing the side antenna 100 and the mobile station side antenna 200, appropriate amplification and averaging processing can be performed on the first signal and the second signal, and waveform distortion can be suppressed.

  DESCRIPTION OF SYMBOLS 10 Relay transmission / reception apparatus, 100 Base station side antenna, 101 Base station side antenna filter, 102 Base station side TDD switch, 103 Base station side LNA, 104 Base station side down converter, 105 Downlink receiving variable gain amplifier, 106 Downstream adjacent channel removal Filter, 107 Downlink ADC section, 108 Downlink waveform memory section, 109 Downlink DAC section, 110 Mobile station side up-converter, 111 Mobile station side HPA, 200 Mobile station side antenna, 201 Mobile station side antenna filter, 202 Mobile station side TDD switch , 203 Mobile station side LNA, 204 Mobile station side down converter, 205 Up reception variable gain amplifier, 206 Up adjacent channel cancellation filter, 207 Up ADC section, 208 Up waveform memory section, 209 Up DAC section, 210 Up transmission amplifier 211 base station side up converter, 212 base station side HPA, 300 frame / slot timing detection unit, 301 reception level measurement unit, 302 downlink relay gain control unit, 303 uplink relay gain control unit, 304 downlink write / read control unit, 305 Uplink writing / reading control unit, 306 Base station side local oscillation circuit (synthesizer), 307 Mobile station side local oscillation circuit (synthesizer).

Claims (9)

A relay transmission / reception device that relays wireless transmission / reception performed between a base station and a mobile station,
A receiving unit for receiving a first signal transmitted / received to / from the base station and a second signal transmitted / received to / from the mobile station;
A frequency converter that converts the frequency of the first signal and / or the second signal so that the frequency of the first signal and the frequency of the second signal are different;
A transmission unit that transmits the first signal and the second signal output from the frequency conversion unit,
Relay transmission / reception device. The frequency converter includes a first signal generating frequency oscillator circuit and a second signal generating frequency oscillator circuit,
The difference between the frequency of the first signal and the frequency of the second signal is defined by the difference between the frequency of the first signal oscillation circuit and the frequency of the second signal oscillation circuit.
The relay transmission / reception apparatus according to claim 1. A memory unit for recording signal information of the first signal and the second signal;
A detector for detecting a frame / slot timing of the first signal;
A first control unit that writes the signal information to the memory unit according to the frame / slot timing detected by the detection unit, and reads the signal information of the memory unit according to the frame / slot timing; Prepared,
The transmission unit transmits the first signal and the second signal according to the read timing in the first control unit,
The relay transmission / reception apparatus according to claim 1. An amplification unit that amplifies and outputs the received first signal and the second signal at a predetermined amplification rate;
A detector for detecting a frame / slot timing of the first signal;
Based on the frame / slot timing in the detection unit, a calculation unit that detects a reception level of the first signal and calculates a reception level average value in units of slots;
A second control unit for controlling the amplification factor in the amplification unit according to the reception level average value in the arithmetic unit;
The transmitter transmits the first signal and the second signal amplified in the amplifier;
The relay transmission / reception apparatus according to claim 1. A relay transmission / reception device that relays wireless transmission / reception performed between a base station and a mobile station,
A receiving unit for receiving a first signal transmitted / received to / from the base station and a second signal transmitted / received to / from the mobile station;
A memory unit for recording signal information of the first signal and the second signal;
A detector for detecting a frame / slot timing of the first signal;
A first control unit that writes the signal information to the memory unit according to the frame / slot timing detected by the detection unit, and that reads the signal information of the memory unit according to the frame / slot timing;
A transmission unit configured to transmit the first signal and the second signal in accordance with the read timing in the first control unit;
Relay transmission / reception device. The first control unit shifts the timing of reception of the first signal and transmission of the second signal or transmission of the first signal and reception of the second signal according to the frame / slot timing. Read the signal information into
The relay transmission / reception apparatus according to claim 5. An amplification unit that amplifies and outputs the received first signal and the second signal at a predetermined amplification rate;
Based on the frame / slot timing in the detection unit, a calculation unit that detects a reception level of the first signal and calculates a reception level average value in units of slots;
A second control unit for controlling the amplification factor in the amplification unit according to the reception level average value in the arithmetic unit;
The transmitter transmits the first signal and the second signal amplified in the amplifier;
The relay transmission / reception apparatus according to claim 5 or 6. A relay transmission / reception device that relays wireless transmission / reception performed between a base station and a mobile station,
A receiving unit for receiving a first signal transmitted / received to / from the base station and a second signal transmitted / received to / from the mobile station;
An amplification unit that amplifies and outputs the received first signal and the second signal at a predetermined amplification rate;
A detector for detecting a frame / slot timing of the first signal;
Based on the frame / slot timing in the detection unit, a calculation unit that detects a reception level of the first signal and calculates a reception level average value in units of slots;
A second control unit for controlling the amplification factor in the amplification unit according to the reception level average value in the calculation unit;
A transmission unit for transmitting the first signal and the second signal amplified in the amplification unit,
Relay transmission / reception device. The frame / slot timing is the timing of the beginning of a radio signal frame and / or the beginning of a slot.
The relay transmission / reception apparatus according to claim 3.

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